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| No. | Title | Registration No. | Inventor | Issue Date |
|---|---|---|---|---|
| 3 | 10-1230205 | J. W. Choi et al. | 2013-01-30 | |
| 2 | 10-1223839 | S. H. Kim et al. | 2013-01-11 | |
| 1 | 10-0975751 | C. H. Choi et al. | 2010-08-06 |
| No. | Title | Registration No. | Inventor | Issue Date |
|---|---|---|---|---|
| 3 | 10-1230205 | J. W. Choi et al. | 2013-01-30 | |
| 2 | 10-1223839 | S. H. Kim et al. | 2013-01-11 | |
| 1 | 10-0975751 | C. H. Choi et al. | 2010-08-06 |